Thor, goaded by Moondragon, comes to realize that the Avengers are holding him back. As Moondragon puts it, he is “slumming.”

After singlehandedly saving the bulk of his friends from some crooked industrialists, he gives a speech. “I am not slow-witted, but my task in the All-Father’s plan doth concern itself more with action than reflection! What I saw not till this battle is that, to adapt to ye mortals I have accustomed myself to withhold my full might! ‘Twas a gradual thing. In Asgard, I have struggled ‘Gainst Gods. On Midgard, we have met mostly human menaces. To avoid the murder of these men – and to avoid the humbling of my friends– I cam to act as less than I am. To thrill to the thunder of battle, I forgot that I am the god thereof!”

The Avengers and their cowboy friends assault Kang’s fortress. While the other heroes fight Kang’s forces, Doctor Donald Blake, dressed as a cowboy with a fake beard, sneaks past the fight to reach Kang himself, before transforming back into Thor.

Thor wales on Kang so badly that the would-be conqueror panics and unleashes so much power that he reduces himself to atoms. With Kang dead, Immortus discorporates.

Thor’s comrade in the Avengers, Hawkeye has been lost in the past after a run-in with Kang the Conquerer. Thor has traveled into the past to rescue him alongside Moondragon, a recent addition to the Avengers. They are joined by Immortus, who has seemingly reformed and who also claims to be an alternate incarnation of Kang.

Thor and his compatriots have ended up in the year 1873 where they immediately encountered a posse of colorfully dressed cowboys. Amongst the posse’s number are Kid Colt, the Two-Gun Kid, Night Rider, and the Ringo Kid. The cowboys let slip that they know where Hawkeye is, and Thor angrily proclaims to the gunslingers that he dislikes firearms and gives a show of force before commanding that they take him and his allies to Hawkeye.

They catch up with Hawkeye, who fills them in: Kang has used future technology to conquer the town of Tombstone as part of his larger plan to get a head start on conquering the 20th century. And so the time-displaced Avengers dress up in semi-period authentic garb and set to foiling Kang’s plans, cowboy style.